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Smartphone reminders tested to boost meal tracking in older adults

NCT ID NCT07555262

Knowledge-focused Sponsor: University of St.Gallen Source: ClinicalTrials.gov ↗

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Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests whether different types of reminder messages can help adults aged 45 and older remember to photograph their meals three times a day. Two hundred participants will receive random reminders before breakfast, lunch, and dinner for 28 days. The goal is to see which reminder style works best and whether factors like heart rate affect how people respond.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 200 people

The number the study aims to enrol. It can still change while the study runs.

Started

Dec 2025

Expected to finish

Jan 2027

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

45 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Citizens or residents of Switzerland who are German-speaking (main place of living or employment in Switzerland). * Age ≥45 years. * BMI ≥25 kg/m² (overweight or obese). * Regular access to a smartphone (iOS or Android) with a data plan. * Able to use smartphone applications. * Able to walk independently. Exclusion Criteria: * History of stroke, heart disease, renal failure, cancer, or diabetes (type 1 or type 2). * Past vascular bypass surgery or angioplasty. * Current or planned use of glucose-lowering medications during the upcoming 4 weeks (e.g., GLP-1 receptor agonists, metformin). * Pregnant or breastfeeding. * Relevant skin conditions at wearable placement sites (e.g., upper arm). * BMI \<25 kg/m² confirmed at enrollment. * FPG ≥7.0 mmol/L and/or HbA1c ≥6.5% (newly identified type 2 diabetes); Individuals who meet type-2 diabetes criteria at enrollment, based on Swiss/ADA diagnostic criteria will be informed of blood test results and referred to a GP. These individuals will be deemed ineligible and excluded from the study.

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Conditions

The condition(s) this trial relates to.

Patient Compliance

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Mobile applications Patient compliance Reminder systems

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • HOCH Health and School of Medicine, University of St. Gallen

    RECRUITING

    Sankt Gallen, Canton of St. Gallen, 9000, Switzerland

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